CN114525755A - Seepage-proofing structure of ecological river channel and construction method thereof - Google Patents

Seepage-proofing structure of ecological river channel and construction method thereof Download PDF

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Publication number
CN114525755A
CN114525755A CN202210283658.2A CN202210283658A CN114525755A CN 114525755 A CN114525755 A CN 114525755A CN 202210283658 A CN202210283658 A CN 202210283658A CN 114525755 A CN114525755 A CN 114525755A
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seepage
layer
soil
protection pad
cushion layer
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丁付革
甘雁飞
周正兵
张骏
陆剑
杜成祥
张恩波
韦雨
王从维
徐磊
成杰
李嘉辉
郭洪伟
侯辉庆
沈阳
彭光明
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CCCC Shanghai Dredging Co Ltd.
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CCCC Shanghai Dredging Co Ltd.
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Priority to CN202210283658.2A priority Critical patent/CN114525755A/en
Publication of CN114525755A publication Critical patent/CN114525755A/en
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    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02B—HYDRAULIC ENGINEERING
    • E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02B—HYDRAULIC ENGINEERING
    • E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
    • E02B3/04—Structures or apparatus for, or methods of, protecting banks, coasts, or harbours
    • E02B3/12—Revetment of banks, dams, watercourses, or the like, e.g. the sea-floor
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02B—HYDRAULIC ENGINEERING
    • E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
    • E02B3/04—Structures or apparatus for, or methods of, protecting banks, coasts, or harbours
    • E02B3/12—Revetment of banks, dams, watercourses, or the like, e.g. the sea-floor
    • E02B3/122—Flexible prefabricated covering elements, e.g. mats, strips
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02B—HYDRAULIC ENGINEERING
    • E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
    • E02B3/16—Sealings or joints
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A20/00—Water conservation; Efficient water supply; Efficient water use
    • Y02A20/40—Protecting water resources
    • Y02A20/402—River restoration

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Environmental & Geological Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Revetment (AREA)

Abstract

The invention discloses an anti-seepage structure of an ecological river channel, which comprises a river bottom anti-seepage structure and a side slope anti-seepage structure. The layer structure of the river bottom seepage-proofing structure is the same as that of the side slope seepage-proofing structure and comprises a coarse sand cushion layer, a composite geomembrane, a fine soil cushion layer, a geotextile, a Reynolds protective cushion layer and a planting soil layer which are sequentially arranged from bottom to top; the thickness of the coarse sand cushion layer is 8-12 cm; two ends of the composite geomembrane are respectively embedded into anchoring grooves formed in the top surfaces of side slopes on two sides of the river channel, and fine soil is filled in the anchoring grooves and then compacted; the thickness of the fine soil cushion layer is 20-40 cm; two ends of the geotextile are respectively embedded into fine soil bedding layers on the top surfaces of the side slopes on two sides of the river channel; the Reynolds protection pad layer is formed by assembling a plurality of rectangular Reynolds protection pad units; and (5) planting aquatic plants on the planting soil layer. The invention also discloses a construction method of the anti-seepage structure of the ecological river channel. The invention has good seepage-proofing and water-storing effects, is convenient to construct and can build a good ecological environment.

Description

Seepage-proofing structure of ecological river channel and construction method thereof
Technical Field
The invention relates to an anti-seepage structure of an ecological river channel and a construction method thereof.
Background
The river channels in northern areas of China are in a dry state for a long time, mainly because the problem of river channel leakage is not solved effectively in the construction process of the river channels. Therefore, an effective river seepage prevention technology is urgently needed to improve the operation efficiency of the river, and simultaneously, water resources can be better utilized, and the function of the river is furthest exerted. The current common river seepage prevention measures comprise:
and (3) soil material seepage prevention: the method generally refers to an anti-seepage measure taking cohesive soil, clay-sand mixed soil, lime soil, three-in-one soil, four-in-one soil and the like as materials; the soil seepage-proofing effect is better, and because the soil sources are abundant, the materials can be obtained locally, the manufacturing cost is low, the investment is less, and the construction is simple. However, the flow rate of the river channel allowed by the soil seepage prevention is low, and the frost resistance of the soil seepage prevention layer is poor, so that the seepage prevention layer is loosened and degraded due to freeze-thaw cycle, and the seepage prevention effect is lost.
Concrete seepage prevention: the method is a river seepage prevention measure widely adopted at present; the concrete seepage-proofing has the advantages of good seepage-proofing effect, long service life and strong durability, and has the defects of poor deformation-adapting capability of the concrete lining plate, higher construction process requirement, strict control on the quality of concrete, the continuity and the timeliness of concrete pouring, higher manufacturing cost in areas lacking of sand and stone materials, high concrete strength, influence on the growth of aquatic plants and damage to the surrounding ecological environment.
Stone laying and seepage prevention: the method mainly achieves the aim of seepage prevention by piling stones to form a layer of seepage-proof wall; when the stone building construction is carried out, firstly, the construction surface of the river channel is cleaned, and then stone is effectively piled on the surface of the river channel through mortar; the stone masonry seepage prevention has the advantages that local materials can be used, the cost is low, and the stone masonry has strong wear resistance and frost resistance; the masonry seepage-proofing method has the defects that the mechanical construction is not easy to adopt, and the construction quality is difficult to control.
Above-mentioned traditional river course prevention of seepage measure can't satisfy the needs that the river course was administered, consequently, need develop one kind promptly and can build good ecological environment to rivers prevention of seepage structure that rivers torrential rush to cause the river course bottom and side slope after the river course retaining of later stage erodees.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides an anti-seepage structure of an ecological river channel and a construction method thereof.
One technical scheme for achieving the purpose of the invention is as follows: an anti-seepage structure of an ecological river channel comprises a river bottom anti-seepage structure and a side slope anti-seepage structure; wherein the content of the first and second substances,
the layer structure of the river bottom seepage-proofing structure is the same as that of the side slope seepage-proofing structure and comprises a coarse sand cushion layer, a composite geomembrane, a fine grained soil cushion layer, a geotextile, a Reynolds protective cushion layer and a planting soil layer which are sequentially arranged from bottom to top;
the coarse sand cushion layer is laid on the surface of a soil body of the river channel, and the thickness of the coarse sand cushion layer is 8-12 cm;
the composite geomembrane is laid on the upper surface of the coarse sand cushion layer, two ends of the composite geomembrane are embedded into anchoring grooves formed in the top surfaces of side slopes on two sides of a river channel in a one-to-one correspondence manner, and fine soil is backfilled in the anchoring grooves and then compacted;
the fine-grained soil cushion layer is laid on the upper surface of the composite geomembrane, and the thickness of the fine-grained soil cushion layer is 20-40 cm;
the geotextile is laid on the upper surface of the fine-grained soil cushion layer, and two ends of the geotextile are embedded into the fine-grained soil cushion layer on the top surfaces of the side slopes on two sides of the river channel in a one-to-one correspondence manner;
the Reynolds protection pad layer is paved on the upper surface of the geotextile and is formed by assembling a plurality of rectangular Reynolds protection pad units; each Reynolds protection pad unit comprises a Reynolds protection pad body, filler and a cover plate, wherein the Reynolds protection pad body consists of a bottom plate, two end plates which are vertically connected with the two ends of the bottom plate in a one-to-one correspondence manner, two side plates which are vertically connected with the two sides of the bottom plate in a one-to-one correspondence manner and a plurality of clapboards which are connected between the two side plates in parallel with the end plates; the filling material is stone blocks, soft stones and concrete blocks; the cover plate is bound and connected with the top of the Reynolds protection pad body by adopting a steel wire;
and the planting soil layer is laid on the upper surface of the Reynolds mattress layer, the thickness of the planting soil layer is 15-30 cm, and aquatic plants are planted on the planting soil layer.
The seepage-proofing structure of the ecological riverway is characterized in that the coarse sand fineness modulus of the coarse sand cushion layer is 3.7-3.1, and the mud content is less than or equal to 6%.
In the anti-seepage structure of the ecological river channel, the composite geomembrane is of a three-layer structure, namely two layers of terylene geotextile are closely bonded with the polyethylene geomembrane in the middle, and the specifications of the two layers of terylene geotextile are both 200g/m2The thickness of the polyethylene geomembrane is 0.6 mm; the cross section of the anchoring groove is a square with the side length of 50 cm.
In the seepage-proofing structure of the ecological river channel, the grain size of the fine soil adopted by the fine soil cushion layer is less than or equal to 3cm, wherein the content of the grains smaller than 5mm is more than or equal to 50%, the content of the grains smaller than 0.075mm is more than or equal to 15%, and the content of the grains smaller than 0.005mm is more than or equal to 8%; compacting the fine soil layer with road roller to a degree of not less than 0.95 to make the permeability coefficient of the fine soil layer not more than 1 × 10-5cm/s。
The anti-seepage structure of the ecological river channel is characterized in that the specification of the geotextile is 300g/m2。
In the seepage-proofing structure of the ecological river channel, the reynolds protection pad body in the river bottom seepage-proofing structure is arranged in a manner that the partition plate is vertical to the water flow direction; the Reynolds protection pad body in the side slope seepage-proofing structure is placed in a mode that the partition plate is parallel to the water flow direction.
In the seepage-proofing structure of the ecological river channel, the reynolds protection pad unit is woven by zinc-5% aluminum-mixed rare earth alloy zinc-plated steel wires with surfaces coated with PVC, and the size specification of the reynolds protection pad is 6m × 2m × 0.3 m; the number of the partition plates is five; one steel wire is bound between the cover plate and the top of the Reynolds protection pad body at an interval of 20-30 cm; the particle size of the filler is 10-20 cm, and the filling rate is 70-95%.
The anti-seepage structure of the ecological river channel is characterized in that the planting soil layer is a mixture of 45-75% of fine-grained soil, 20-35% of excrement and 10-20% of organic fertilizer in percentage by mass.
In the seepage-proofing structure of the ecological river channel, the aquatic plants are one or more of lotus, hydrilla verticillata, potamogeton crenata, goldfish algae, foxtail algae paniculata, short tape grass and arrowroot algae.
The other technical scheme for realizing the purpose of the invention is as follows: a construction method of an anti-seepage structure of an ecological river channel comprises the following steps:
firstly, cleaning surface soil of an original river channel, shaping the river channel through earthwork excavation and earthwork backfilling, and then respectively forming an anchoring groove on the top surfaces of side slopes on two sides of the river channel along the water flow direction of the river channel;
secondly, paving a coarse sand cushion layer with the thickness of 8-12 cm on the molded riverway soil body;
thirdly, laying a composite geomembrane on the upper surface of the coarse sand cushion layer, rolling and laying the rolled composite geomembrane from the top ends of the side slopes on the two sides to the bottoms of the side slopes, and then rolling and laying the river bottom part; embedding two ends of the composite geomembrane into the anchoring grooves on the top surfaces of the two bank slopes in a one-to-one correspondence manner, backfilling fine soil into the anchoring grooves and compacting; when the length of the composite geomembrane is not enough, hot melting splicing is adopted at the river bottom, the overlapping length of each splicing seam is 1.5-2 m, and the adjacent splicing seams are ensured to be staggered;
paving fine soil with the thickness of 20-40 cm on the composite geomembrane, and then rolling and compacting by using a road roller;
laying geotextile on the upper surface of the fine-grained soil cushion layer, embedding two ends of the geotextile into the fine-grained soil cushion layer on the top surfaces of the side slopes on two sides of the river channel in a one-to-one correspondence manner, and compacting;
laying a Reynolds protection pad layer on the upper surface of the geotextile, placing a Reynolds protection pad body firstly, placing the Reynolds protection pad body positioned at the river bottom in a mode that the partition plate is vertical to the water flow direction, and placing the Reynolds protection pad body positioned on the side slopes at two sides in a mode that the partition plate is parallel to the water flow direction; connecting adjacent Reynolds protection pad bodies by adopting steel wire binding, filling filler into each Reynolds protection pad body, filling the filler in layers, wherein the top surface of the filler is 2-6 cm higher than the top surface of the Reynolds protection pad body, and then connecting the cover plate with the end plates, the side plates and the partition plates of the Reynolds protection pad body by adopting the steel wire binding;
step seven, paving a planting soil layer on the upper surface of the Reynolds cushion layer;
and step eight, planting aquatic plants on the upper surface of the planting soil layer, wherein the aquatic plants adopt one or more of lotus, hydrilla verticillata, potamogeton crenata, goldfish algae, foxtail spicatus, short tape grass and dats algae.
The seepage-proofing structure of the ecological river channel and the construction method thereof have the following characteristics:
1) the composite geomembrane, the fine-grained soil, the geotextile and other multi-layer anti-seepage materials are adopted for water blocking, two ends of the composite geomembrane are respectively embedded into the anchoring grooves, the composite geomembrane is ensured to be tightly connected with the fine-grained soil cushion layer, two ends of the geotextile respectively extend into the fine-grained soil cushion layer, and the Reynolds protection cushion layer is paved on the upper portion of the geotextile, so that the anti-seepage structure strength and the anti-seepage effect are improved.
2) The arrangement of the Reynolds cushion layer can reduce the erosion damage to the bottom of the river channel and the side slope caused by the torrential water flow after the later-stage river channel water storage.
3) The planting soil is improved by utilizing the existing fine-grained soil and adding a proper amount of excrement and organic fertilizer, so that the growth effect of the aquatic plants is good, the resource utilization is realized, and a good ecological environment can be created.
Drawings
Fig. 1 is a cross-sectional view of an anti-seepage structure of an ecological river of the present invention;
FIG. 2 is a schematic diagram of the placement of the Reynolds protection mat at the river bottom in the anti-seepage structure of the ecological river channel;
FIG. 3 is a schematic diagram of the placement of the Reynolds protection pads located on the side slopes in the anti-seepage structure of the ecological river;
Detailed Description
The invention will be further explained with reference to the drawings.
Referring to fig. 1 to 3, the seepage-proofing structure of the ecological river channel of the present invention includes a river bottom seepage-proofing structure 11 and a slope seepage-proofing structure 12.
The layer structure of the river bottom seepage-proofing structure 11 is the same as that of the side slope seepage-proofing structure 12 and comprises a coarse sand cushion layer 1, a composite geomembrane 2, a fine grained soil cushion layer 3, a geotextile 4, a Reynolds cushion layer 5 and a planting soil layer 6 which are arranged from bottom to top in sequence; wherein the content of the first and second substances,
the coarse sand cushion layer 1 is laid on the surface of a soil body of a river channel, and the thickness of the coarse sand cushion layer 1 is 8-12 cm; the coarse sand fineness modulus of the coarse sand cushion layer 1 is 3.7-3.1, and the mud content is less than or equal to 6%;
the composite geomembrane 2 is of a three-layer structure, namely two layers of terylene geotextile are closely bonded with the polyethylene geomembrane in the middle, and the specifications of the two layers of terylene geotextile are both 200g/m2The thickness of the polyethylene geomembrane is 0.6 mm; the composite geomembrane 2 is laid on the upper surface of the coarse sand cushion layer 1, two ends of the composite geomembrane 2 are embedded into anchoring grooves 20 formed in the top surfaces 10 of side slopes on two sides of a river channel in a one-to-one correspondence manner, and fine-grained soil is filled in the anchoring grooves 20 for compaction; the cross section of the anchoring groove 20 is a square with the side length of 50 cm;
the fine-grained soil cushion layer 3 is laid on the upper surface of the composite geomembrane 2, and the thickness of the fine-grained soil cushion layer 3 is 20-40 cm; the grain size of the fine soil adopted by the fine soil cushion layer 3 is less than or equal to 3cm, wherein the content of the grains smaller than 5mm is more than or equal to 50%, the content of the grains smaller than 0.075mm is more than or equal to 15%, and the content of the grains smaller than 0.005mm is more than or equal to 8%; the fine soil layer 3 is compacted by a road roller of 20T, the compaction degree is more than or equal to 0.95, and the permeability coefficient of the fine soil layer 3 is less than or equal to 1 multiplied by 10-5cm/s。
The specification of the geotextile 4 is 300g/m2The geotextile 4 is laid on the upper surface of the fine-grained soil cushion layer 3, and two ends of the geotextile 4 are embedded into the fine-grained soil cushion layer 3 on the top surfaces 10 of the side slopes on two sides of the river channel in a one-to-one correspondence manner and are compacted;
the Reynolds protection cushion layer 5 is paved on the upper surface of the geotextile 4, the Reynolds protection cushion layer 5 is formed by assembling a plurality of rectangular Reynolds protection cushion units, and the dimension specification of each Reynolds protection cushion unit is 6m multiplied by 2m multiplied by 0.3 m; the Reynolds protection pad unit is woven by zinc-5% aluminum-mixed rare earth alloy zinc-plated steel wires with PVC coated surfaces; each Reynolds pad unit comprises a Reynolds pad body, filler and a cover plate 55, wherein the Reynolds pad body consists of a bottom plate 51, two end plates 52 vertically connected to two ends of the bottom plate 51 in a one-to-one correspondence manner, two side plates 53 vertically connected to two sides of the bottom plate 51 in a one-to-one correspondence manner and five partition plates 54 connected between the two side plates 53 in parallel with the end plates 52; the filling material adopts block stones, soft stones and concrete blocks with the particle size of 10-20 cm, and the filling rate is 70-95%; the cover plate 55 is bound and connected with the top of the end plate 52, the top of the side plate 53 and the top of the partition plate 54 of the Reynolds pad body through steel wires, and the distance between the steel wires is 20-30 cm; the Reynolds protection pad body in the river bottom seepage-proofing structure 11 is placed in a way that the partition plate 54 is vertical to the water flow direction; the Reynolds protection pad bodies in the side slope anti-seepage structure 12 are arranged in a way that the partition plates 54 are parallel to the water flow direction;
the planting soil layer 6 is laid on the upper surface of the Reynolds mattress layer 6, the thickness of the planting soil layer 6 is 15-30 cm, and the planting soil layer 6 is a mixture of 45-75% of fine soil, 20-35% of excrement and 10-20% of organic fertilizer in percentage by mass; and planting an aquatic plant 7 on the planting soil layer 6, wherein the aquatic plant 7 is one or more of lotus, hydrilla verticillata, potamogeton crenata, goldfish algae, foxtail algae paniculata, short tape grass and large arrowhead algae.
The construction method of the anti-seepage structure of the ecological river channel comprises the following steps:
firstly, cleaning surface soil of an original river channel, shaping the river channel through earthwork excavation and earthwork backfilling, and then respectively forming an anchoring groove 20 on the top surfaces 10 of side slopes on two sides of the river channel along the water flow direction of the river channel; the cross section of the anchoring groove 20 is a square with the side length of 50 cm;
secondly, paving a coarse sand cushion layer 1 with the thickness of 8-12 cm on the molded riverway soil body; the thickness of the coarse sand cushion layer 1 is preferably 10 cm;
thirdly, laying a composite geomembrane 2 on the upper surface of the coarse sand cushion layer 1, rolling and laying the rolled composite geomembrane 2 from the top ends of the side slopes on the two sides to the bottoms of the side slopes, and then rolling and laying the river bottom part; two ends of the composite geomembrane 2 are embedded into the anchoring grooves 20 on the top surfaces 10 of the two bank slopes in a one-to-one correspondence manner, and fine soil is filled in the anchoring grooves 20 and then compacted; when the length of the composite geomembrane is not enough, hot melting splicing is adopted at the river bottom, the overlapping length of each splicing seam is 1.5-2 m, and the adjacent splicing seams are ensured to be staggered;
fourthly, paving a fine-grained soil cushion 3 on the composite geomembrane 2, and then rolling and compacting by adopting a 20T road roller to form a fine-grained soil layer 3 with the thickness of 20-40 cm, wherein the thickness of the fine-grained soil cushion 3 is preferably 35 cm;
fifthly, laying geotextile 4 on the upper surface of the fine-grained soil cushion layer 3, wherein the laying method of the geotextile 4 is the same as that of the composite geomembrane 2, and the two ends of the geotextile 4 are embedded into the fine-grained soil cushion layer 3 on the top surfaces 10 of the side slopes on the two sides of the river channel in a one-to-one correspondence manner and are compacted;
step six, paving a Reynolds protection pad layer 5 on the upper surface of the geotextile 4, placing Reynolds protection pad bodies firstly, placing the Reynolds protection pad bodies positioned at the river bottom in a mode that the partition plates 54 are vertical to the water flow direction, and placing the Reynolds protection pad bodies positioned on the side slopes at the two sides in a mode that the partition plates 54 are parallel to the water flow direction; the method comprises the following steps of binding and connecting adjacent Reynolds protection pad bodies by using steel wires, filling filler into each Reynolds protection pad body, wherein the filler is stone blocks, soft stones and concrete blocks, the particle size of the filler is 15cm, the filler is filled in layers, the filling rate is 85%, the top surface of the filler is 2-6 cm higher than that of the Reynolds protection pad body, and is preferably 4cm, and then binding and connecting a cover plate 55 with an end plate 52, a side plate 53 and a partition plate 54 of the Reynolds protection pad body by using the steel wires;
step seven, paving a planting soil layer 6 with the thickness of 15-30 cm on the upper surface of the Reynolds cushion layer 5, wherein the thickness of the planting soil layer 6 is preferably 20 cm; the planting soil layer 6 is a mixture of 45-75% of fine-grained soil, 20-35% of excrement and 10-20% of organic fertilizer in percentage by mass;
and step eight, planting aquatic plants 7 on the upper surfaces of the planting soil layers 6, wherein the aquatic plants 7 are one or more of lotus, hydrilla verticillata, potamogeton denticulata, goldfish algae, foxtail spicatus, short tape grass and arrowroot algae.
3) The planting soil is improved by using the existing fine-grained soil and adding a proper amount of excrement and organic fertilizer, so that the growth effect of the aquatic plants is good, the resource utilization is realized, and a good ecological environment can be created.
The above embodiments are provided only for illustrating the present invention and not for limiting the present invention, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and therefore all equivalent technical solutions should also fall within the scope of the present invention, and should be defined by the claims.

Claims (10)

1. An anti-seepage structure of an ecological river comprises a river bottom anti-seepage structure and a side slope anti-seepage structure; it is characterized in that the preparation method is characterized in that,
the layer structure of the river bottom seepage-proofing structure is the same as that of the side slope seepage-proofing structure and comprises a coarse sand cushion layer, a composite geomembrane, a fine grained soil cushion layer, a geotextile, a Reynolds protective cushion layer and a planting soil layer which are sequentially arranged from bottom to top;
the coarse sand cushion layer is laid on the surface of a soil body of the river channel, and the thickness of the coarse sand cushion layer is 8-12 cm;
the composite geomembrane is laid on the upper surface of the coarse sand cushion layer, two ends of the composite geomembrane are embedded into anchoring grooves formed in the top surfaces of side slopes on two sides of a river channel in a one-to-one correspondence manner, and fine soil is backfilled in the anchoring grooves and then compacted;
the fine-grained soil cushion layer is laid on the upper surface of the composite geomembrane, and the thickness of the fine-grained soil cushion layer is 20-40 cm;
the geotextile is laid on the upper surface of the fine-grained soil cushion layer, and two ends of the geotextile are embedded into the fine-grained soil cushion layer on the top surfaces of the side slopes on two sides of the river channel in a one-to-one correspondence manner;
the Reynolds protection pad layer is paved on the upper surface of the geotextile and is formed by assembling a plurality of rectangular Reynolds protection pad units; each Reynolds protection pad unit comprises a Reynolds protection pad body, filler and a cover plate, wherein the Reynolds protection pad body consists of a bottom plate, two end plates which are vertically connected with the two ends of the bottom plate in a one-to-one correspondence manner, two side plates which are vertically connected with the two sides of the bottom plate in a one-to-one correspondence manner and a plurality of clapboards which are connected between the two side plates in parallel with the end plates; the filler is rock block, soft stone and concrete block; the cover plate is bound and connected with the top of the Reynolds protection pad body by adopting a steel wire;
and the planting soil layer is laid on the upper surface of the Reynolds mattress layer, the thickness of the planting soil layer is 15-30 cm, and aquatic plants are planted on the planting soil layer.
2. The seepage-proofing structure of the ecological riverway as claimed in claim 1, wherein the coarse sand fineness modulus of the coarse sand cushion layer is 3.7-3.1, and the mud content is less than or equal to 6%.
3. The seepage-proofing structure of an ecological river channel according to claim 1, wherein the composite geomembrane is a three-layer structure, namely two layers of terylene geotextile are tightly bonded with the middle polyethylene geomembrane, and the specifications of the two layers of terylene geotextile are both 200g/m2The thickness of the polyethylene geomembrane is 0.6 mm; the cross section of the anchoring groove is a square with the side length of 50 cm.
4. The seepage-proofing structure of the ecological river channel according to claim 1, wherein the grain size of the fine soil adopted by the fine soil bedding layer is less than or equal to 3cm, wherein the content of the grains smaller than 5mm is more than or equal to 50%, the content of the grains smaller than 0.075mm is more than or equal to 15%, and the content of the grains smaller than 0.005mm is more than or equal to 8%; compacting the fine soil layer with road roller to a degree of not less than 0.95 to make the permeability coefficient of the fine soil layer not more than 1 × 10-5cm/s。
5. The ecological river course seepage prevention structure of claim 1, wherein the geotextile has a specification of 300g/m2。
6. The seepage-proofing structure of the ecological river channel of claim 1, wherein the reynolds protection pad bodies in the river bottom seepage-proofing structure are arranged in a manner that the partition plates are perpendicular to the water flow direction; the Reynolds protection pad body in the side slope seepage-proofing structure is placed in a mode that the partition plate is parallel to the water flow direction.
7. The seepage-proofing structure of an ecological river channel according to claim 1 or 6, wherein the Reynolds protection pad unit is woven by zinc-plated steel wires of zinc-5% aluminum-mixed rare earth alloy with PVC coated on the surface, and the size specification of the Reynolds protection pad is 6m x 2m x 0.3 m; the number of the partition plates is five; one steel wire is bound between the cover plate and the top of the Reynolds protection pad body at an interval of 20-30 cm; the particle size of the filler is 10-20 cm, and the filling rate is 70-95%.
8. The seepage-proofing structure of the ecological river channel according to claim 1, wherein the planting soil layer is a mixture of 45-75% of fine soil, 20-35% of excrement and 10-20% of organic fertilizer by mass percent.
9. The ecological riverway seepage-proofing structure as claimed in claim 1, wherein the aquatic plants are one or more of lotus, hydrilla verticillata, potamogeton denticulata, hornworts, watermifoil, short-type eel grass and arrowroot algae.
10. The construction method of the anti-seepage structure of the ecological river channel is characterized by comprising the following steps:
firstly, cleaning surface soil of an original river channel, shaping the river channel through earthwork excavation and earthwork backfilling, and then respectively forming an anchoring groove on the top surfaces of side slopes on two sides of the river channel along the water flow direction of the river channel;
secondly, paving a coarse sand cushion layer with the thickness of 8-12 cm on the molded riverway soil body;
thirdly, laying a composite geomembrane on the upper surface of the coarse sand cushion layer, rolling and laying the rolled composite geomembrane from the top ends of the side slopes on the two sides to the bottoms of the side slopes, and then rolling and laying the river bottom part; embedding two ends of the composite geomembrane into the anchoring grooves on the top surfaces of the two bank slopes in a one-to-one correspondence manner, backfilling fine soil into the anchoring grooves and compacting; when the length of the composite geomembrane is not enough, hot melting splicing is adopted at the river bottom, the overlapping length of each splicing seam is 1.5-2 m, and the adjacent splicing seams are ensured to be staggered;
paving fine soil with the thickness of 20-40 cm on the composite geomembrane, and then rolling and compacting by adopting a road roller;
laying geotextile on the upper surface of the fine-grained soil cushion layer, embedding two ends of the geotextile into the fine-grained soil cushion layer on the top surfaces of the side slopes on two sides of the river channel in a one-to-one correspondence manner, and compacting;
laying a Reynolds protection pad layer on the upper surface of the geotextile, placing a Reynolds protection pad body firstly, placing the Reynolds protection pad body positioned at the river bottom in a mode that the partition plate is vertical to the water flow direction, and placing the Reynolds protection pad body positioned on the side slopes at two sides in a mode that the partition plate is parallel to the water flow direction; connecting adjacent Reynolds protection pad bodies by adopting steel wire binding, filling filler into each Reynolds protection pad body, filling the filler in layers, wherein the top surface of the filler is 2-6 cm higher than the top surface of the Reynolds protection pad body, and then connecting the cover plate with the end plates, the side plates and the partition plates of the Reynolds protection pad body by adopting the steel wire binding;
step seven, paving a planting soil layer on the upper surface of the Reynolds cushion layer;
and step eight, planting aquatic plants on the upper surface of the planting soil layer, wherein the aquatic plants adopt one or more of lotus, hydrilla verticillata, potamogeton crenata, goldfish algae, foxtail spicatus, short tape grass and dats algae.
CN202210283658.2A 2022-03-22 2022-03-22 Seepage-proofing structure of ecological river channel and construction method thereof Pending CN114525755A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116607461A (en) * 2023-06-19 2023-08-18 宿迁市宿城区水利工程建设服务中心 River channel seepage prevention structure and river channel seepage prevention method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116607461A (en) * 2023-06-19 2023-08-18 宿迁市宿城区水利工程建设服务中心 River channel seepage prevention structure and river channel seepage prevention method
CN116607461B (en) * 2023-06-19 2023-12-12 宿迁市宿城区水利工程建设服务中心 River channel seepage prevention structure and river channel seepage prevention method

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